I'd rather say standard spoken French is dropping the ne while informal spoken French is merging je and suis in a single syllable, either j'suis or chuis. I believe a large majority of native French people would say chuis pas un garçon in real life conversation.
– jlliagreJan 12 at 4:00

Actually, it is a very good question. Most native speakers don't use ne when they speak but use it when they write. I do that too.

However, as stated above, if you study french, the best way is to use ne when you write so you can get a good habit in writing French. After being used to that for a while, you may remove the ne when you speak, as it's more French and you'll sound more like a native.